Title :
Impact of feedback and user pairing schemes on receiver performance in MU-MIMO LTE systems
Author :
Badic, B. ; Balraj, R. ; Scholand, T. ; Bai, Z. ; Iwelski, S.
Author_Institution :
Intel Mobile Commun. (IMC), Duisburg, Germany
Abstract :
This paper addresses the problem of feedback design for MU-MIMO (multi-user multiple input multiple output) transmission in 3GPP Long Term Evolution (LTE) systems. The CSI (channel state information)-based feedback introduced in the latest release of LTE, Rel-10 is adopted in MU-MIMO transmission and potential performance gains are demonstrated over Rel-8 CQI/PMI (channel quality indicator/precoding matrix indicator)-based feedback mechanism at the link level. The LTE downlink performance has been evaluated for various MU-MIMO feedback schemes and for low complexity receivers. The results have shown that the CSI-based feedback can make a significant tradeoff between receiver performance and complexity in MU-MIMO therewith reducing the design requirements for advanced receiver concepts.
Keywords :
3G mobile communication; Long Term Evolution; MIMO communication; radio receivers; 3GPP Long Term Evolution systems; CSI-based feedback; MU-MIMO LTE system; Rel-8 CQI-PMI; channel quality indicator-precoding matrix indicator-based feedback mechanism; feedback scheme; low complexity receivers; multiuser multiple input multiple output transmission; receiver performance; user pairing scheme; Complexity theory; Correlation; Interference; MIMO; Radio access networks; Receivers; Vectors;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2012 IEEE
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-0436-8
DOI :
10.1109/WCNC.2012.6214398
